What’s Vulnerable › Vulnerabilities

CVE-2020-5942

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-11-05 · updated 2026-06-17

Description

In BIG-IP PEM versions 16.0.0-16.0.0.1, 15.1.0-15.1.0.5, 14.1.0-14.1.2.7, 13.1.0-13.1.3.4, 12.1.0-12.1.5.2, and 11.6.1-11.6.5.2, when processing Capabilities-Exchange-Answer (CEA) packets with certain attributes from the Policy and Charging Rules Function (PCRF) server, the Traffic Management Microkernel (TMM) may generate a core file and restart.

Affected products

• F5 Networks, Inc. BIG-IP (PEM): from 11.6.1 through 11.6.5.2; from 12.1.0 through 12.1.5.2; from 13.1.0 through 13.1.3.4; from 14.1.0 before 14.1.2.8; from 15.1.0 before 15.1.1; from 16.0.0 before 16.0.1 — fixed in 14.1.2.8, 15.1.1, 16.0.1

How to fix

Upgrade to a fixed version: F5 Networks, Inc. BIG-IP (PEM) 14.1.2.8, 15.1.1, 16.0.1. Check the vendor advisory for mitigations.

References

• https://support.f5.com/csp/article/K82530456
• https://support.f5.com/csp/article/K82530456

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